Pattern for bathtubs



Oct. 2, 1928. 1,686,001

H. E. HENRICKS PATTERN FOR BATHTUBS Filed Sept. 30, 1925 5 Sheets-Sheetl v INVENT R.

LM A4 BY ATTORNEYS.

H. E. HENRICKS PATTERN FOR BA'I'HTUBS Oct. 2, 192 8.

Filed Sept. 30, 1925 5 Sheets-Sheet 5 a W/MWM j ATTORNEYS INVEN TOR. IALMA/W04.

Oct. 2, 1928.

H. E. HENRECKS PATTEBN FOR BATHTUBS Filed Sept. 30, 1925 5 Sheets-$heet1 3 INVENTO BY M A ATTORNEYS.

Get. 2, 1928.

H. E. HENRlCKS PATTERN FOR BATHTUBS Filed Sept. 30, 1925 5 Sheets-Sheet4 INVENTOR.

J ATTORNEYS.

Oct. 2, 1928.

H. E. HENRICKS PATTERN FOR BATHTUBS Filed Sept. $0, 1925 5 Sheets-Sheet5 .M W fl ATTORNEYS Patented Oct. 2.192s.

inseam T D STATES PAT NT orrtcar HENRY E. HENRICKS, F BEAVER,PENNSYLVANIA, AssIGNort 5120 THE 'UNITEDSTATES SANITARY MANUFACTURINGCOMPANY, OF rIrTsBuRcH,.PENNsYLv I A 002a PORATION OF PENNSYLVANIA.

PATTERN FOR BATHTUBS.

Application filed september 30 1925. Serial No. 59,530.

' This invention relates to bath tubs, and is particularly directedtoward pattern .for what is knownas a single shield type of tub. Oneobject of my invention is to'providea 5 pattern for a bath tub such thata shield is provided on the finished bath tub that is coplanar with atub wall. 1

Another'object of my invention is to provide a pattern for bathtubs suchthat a shield is formed co-planar-with a tub wall in green sand mold. Afurther object of myinvention is to provide a pattern for a bath tubhaving attach ing shields on at least one wall in which the shieldportions of the pattern are separable from and'movable independently ofthe main body of the pattern.

In the single shield typ ne tub Wall of a builtin tub is exposed toviewand connection with the building wall is made by a shield portionintegral with the tub. Heretofore these shield portions have beensoplaced as to project from an end wall of the tub, thus'eX- posing notonly a'side wall but also the tub' corner, and provide an irregular andrather unsightly contour. type have beenmolded integral with the tub byproviding shieldportions which might be withdrawn into the tub patternproper before stripping the cope portion of the flask from the pattern.It will be understood of course that in a commercial manufacture of bathtubs the molding is done by means of matched patterns, the cope and thedrag being made up separately and brought together on a casting floor.Generally speaking, all I bath tubs are cast upside down so that the woutside contour of the tub is formed in the cope portion of the mold;

Another form of shield which has been used is formed by extending thetub wall to the'floor by means of a dry sand'core, which a is put inplace after the copehas been rammed and the pattern withdrawn. Thisstyle of shield is also rather unsightly because in order to get metalof sufliciently uniform thickness top-revent cracking of the castings Iand also-to eliminate defective castings by reason of loose san'd, ithas been necessary to set the shield back a short distance from theplaneof the exposed tub wall so' that there is afvery definite? breakbetween the tub wall and the shield proper,

Shields of the above By the use of my pattern I provide a'bath tubhaving a substantially plane shield extending the length of the tub,-'aportioniof such shie'ldforming one wall'of the tub proper; Stated inianother way, the side wall is extended beyond the body ofth-e tub properso as toprovide a shield, this extension being substantially fro-planarwith the tub wall.

The invention may be embodied in a tub of the recesstype, that is, a tubextending from one wall to anotherand completely filling the spacebetween, or to a corner tub which fits n one corner of the room and hasone shield on aside ofthe tub and'another'on the endthereof. 7

A pattern for making the above described bath tub, comprises a tub wallmolding portion and a separate shield molding portion,

the shield molding portion being adapted for movement relative to thetub pattern? to a point substantially out-side the mold. Thisshield'molding portion is moved at a suitable inclination to. providedraft and permit. a

clean withdrawal of the shield molding por tion from the mold afterwhich the entire mold maybe stripped from the main body of the patternvwithout injury. .ItisPossible with this pattern toform theentire moldin green sand and to do away entirely with cores.

The flask is of course stripped from the pattern in a vertical directionand in a com-- mercial foundry: is handled by overhead cranes. Strippingpins are provided for lifting the flask a distance of about-four inchesso asto insure a clean removal of the flask from the" pattern before itis picked up by the crane. These pins 'move the flask vertically and fora shield whichterminat'es in a vertical line there is no draft whateverin the pattern.

The tub walls usually slope toward one It is therefore necessary toimpart to the shield molding portionof thepattern a component ofmovementtoward the another at the bottom of thetub and this a means thatthe shield will be a plane whlch is inclined to the vertical.

necessary to provide draft on the tub walls Since the cope and thedraga're formed separately it is not 7 proper but draft is provided onthe Shield I sary to withdraw sitionvin the mold during rammingu thanportion or portions. Since the exposed face of theshield is co-planarwith the outer face of the tub wall the draft is provided on the itdoeswhen the drag is matched with its correspondin cope. Supposing, forexam- '20 pic, that a tu wall is designed to present an angle of 7 tothe Vertical, it is desirable to tilt theentire pattern about 1 's Ithas been found in actual'practice that this tilting ofthe tub bodymaterially simplifies the moldingoperation and makes more certain theproduction of sharp clean corners on the casting.

I ,In order to. secure the above described movementsof the shieldmolding portion I provide fluid operated cylinders under the control ofthe molder and suitably connected to the shield molding portions forwithdrawing them from the flask at the desired time. Fluid operatedcylinders provide a smooth I and soft action which is exceedingly- ,de-

sirable in an operation of this character.

Preferably the stripping pins above mentioned are also operat'edby afluid cylinder.

the control system for the cylinders means is' provided for'actuatingthe several cylinders in sequence so that it is impossible to striptheflask from the pattern before the shield .-molding portions have beenwithdrawn. i

In the accompanying drawings which illustrate a preferred embodiment ofthe invention:

"Figure 1 is-a side elevation of a bathtub made according tomyinvention; 7 I

-:.Figure 2- is a horizontal section through the tub on the line II'-IIof Figure 1;

Figure 3 is an end view of the tub; v i Figure 4 is a top plan viewpartly broken may, of a 'pattern forimolding the tub shown inFigures 1to 3and showing one of the shield molding portions in place;

Figure 5 is a side view of the pattern shown Figure 4,but with both theshield molding portions removed;

' Figure 6 is a vertical section through a molding .machine embodyingthe pattern shown in Figures 4 and 5;

Figure 7 is a vertical section on the line I VII-VII of Figure 6, butshowing a portion of the pattern broken away; 7

Figure 8 is a top plan view partly broken away, of the molding machineshown in Figures 6 and 7 i In the illustrated embodiment of theinvention there is shown a tub body of the re cess type comprising endwalls 2 and a side wall 3. This wall is connected to theend walls 2 bycurved corner portions 4. The

side wall 3 has shield portions 5 extending beyond the corner portions 4and end walls 2 so as to provide a substantially plane surface which,when the tub is in place, will conceal the outer surfaces of the endwalls Q'and corner portions 4 as shown in Figure 1. The 1 entire wallextends downwardly to thebottom of the feet 6 on the tub, as shown inFigure 3. The usual roll rim 7 extends beyond the wall or shield as iscommon in tubs of this character. r

In accordance with usual 'commerc al practice, the tub is cast upsidedown and the cope andthe drag are molded apart from one another bymatched patterns as is well known inthis art. It will be noted that theshield portionsfi'are cast entirely in the cope as is the shield portionwhich extends below the tubbottom, which portion is indicated in thedrawings by the reference characterS. It is necessary to provide draftfor these shield portions and this is provided on the back face of theshield as shown at 9 in Figure 3.

It will be further noted that the-wall?) is at an angle to a verticalline ov. As heretofore described, the shield portion is' cast byproviding a corresponding portion on the pattern whichis removed from.the .cope

loo

prior to stripping the same from'the pattern proper to a point outsidethe pattern. It will be clear from Figure 3 that. 'it'is necessary towithdraw this loose piece-at an angle to the vertical. I l

It will also be appreciated that the end wall 5 of the shield portions5, being necessarily vertical by reason of the design of the tub, doesnot permit the allowance of draft on this portion ofthe patternandtherefore the shield molding portionmust be moved inwardly towardthebody of the tub in a direction lengthwise of thetub in the exampleshown. Of course if a corner type tub were being molded, it would benecessary to withdraw the end shield crosswise of the tubas well asinwardly inthe other plane. 1

The pattern for forming the cope half of the mold is shownin Figures 4and 5. It will be noted that it comprises a body portionzindicatedgenerally by the reference character B and movable shield portions oneof which is shown in Figure 4 and indicated generally by the referencecharacter S. The body portion is hollow and accommodatescertain of theoperating mechanism hereinafter de-v provided for the shield portion S.The shield portion is fitted in place and a plate '11 is fitted theretoto hold it properly in the guides. As shown in Figure 5, theseguides'are sloped so that the 'shield po'rtions are withdrawn at anangle from the vertical edge 5 in a direction: parallel to the majoraxis of the cope and permit a clean withdrawal. 7

Referring now to Figure 6 it will be seen that the shield portions 8'are mounted on slidable posts 12 provided withguides13 molded cope fromthe patternnear the bottom and-also provided with operat'ing racks 14.The racks l l are engaged by pinions 15 mounted on a pair of crossshafts molding machine. 'Keyed to the shafts 16fare pinions 17 which areengaged .by racks 18 secured to a slide 19. The slide 19 is mounted "inguides 20 secured to the frame of the molding machineand carries apairof fluid actuated cylinders 21. The cylinders are double acting and areprovided with pistons secured to piston rods 22 which are in turnfastened to-the frame of the machine as indicated at 23. When actuat- 16which are journaledin the frame of the ing fluid, preferably air, isadmitted to theseeylinders the slide 19 is causedto move and theshieldportions S are moved to theupper position indicated in Figure 6 or aremoved downwardly to a point substantially outside the mold so- 'astopermit withdrawal of the Adjusting screws 24 are placed in the head ofeach of the cylinders 21 and these are'used toregulate the upper andlower positions of the shield portions S. I V

entire pattern slightly EIIICl'thlS is clearly shown in Figure 7 of thedrawings? It will 7 also be noted from that View that the posts 12*areso mounted that they move at an angle to the vertical as viewed inFigure. .7 so as to secure'a clean withdrawalfrom the sand not only of.the front face 5? of the shield i portion, but also of the rear face5thereof.

Ai"ter the flask has been rammed up and the shield portions S withdrawn,the flask is ready for stripping from the main body, of

V the pattern; This stripping is accomplished by pins 25 which aremounted for Vertical movement in the frame of themolding mas chine. Thepins are provided with rack, teeth 26 engagingpinions 27,-mountedoncross I shafts 28. These cross shafts carry pin-ions 29 at their centralportions and the pinions 29 are engaged by racks "30' mounted on a slide31. ,The'slide 31 carries a fluid cylinder 32. The cylinder is doubleacting and its piston rod 33 is secured to a cross piece 34. It will beseen that admission of fluid to one end or the other of the cylinder 32will: cause the slide 31 to move to the right or the left and cause thepins 25 to move up or: down. 4 It will be noted that the cylinder 32 andthe associated mechanism are within the body they" will occupy tance ofaboutfou r inches.

portion of the pattern. Thisfisno-t only a,

convenientdisposition of these parts, but. the cross piece '34: alsoserv'es asa brace? for the front wall ofthe tub pattern, which wall isleft unsupported at its ends by reason of the cuttingoutof the;corner-to provide forthe shield forming pieces s from the-flask, thisend the control mechanism for actuating the cylinders is provided withmeans for con}- trolling the operation of the cylinders in a definitesequence.

The cylinders are shown in Figures 7and 8 as being in-the position whena mold has been pins 25*is rammed upbefore the shield forming por tionshavebeen withdrawn; When air is ad mitted to the-left hand end of" thecylinders 21 as-viewed in the dr'awings, the cylinders and the slides towhich theyare attached move to'the left, thus rotating'the shafts: 16

counterclockwise and causing the withdrawal of the shield portions Sfromthe mold.

. Attached to one of the cylinders21 is an arm 41 for, cooperation witha control systern which comprises rod 42 ofv operating fingers 43 and43?thereon after' the-movement of-the cylinders 21. y w As above stated, itis desirable to tilt the Continuingl with the operation of thematchino;the cylinders 21 move to the left'until having a pair.

It)" I air is admitted to the right hand 'en-dof-the' cylinder 32 asviewed inthedrawings. This causes the cylinder and the slide-on which itis mounted to. move to the right, thus rotating J the shafts 28 in'aclockwise direction and raising-thestripping' pins 25.T-:'-T:l18SBstripping. pins engagethe walls of the flask and lift it vertically:from the' pattern'for 'a-disin this raised position until bythe craneand taken awa The completed cope hal-tz'of the maid being now withdrawnfrom'th'e machine; it'i's'fiecess'arylto' return the parts to: their;original position for molding the nextltub p This is done byadmitting'air to the ri'ghthandends of the cylinders 21. and causingthem tomove tothe right. Thismovcn'ientfis:effectivefor rotatin'g theshafts 16 me clockwise dime-- tion and raising theshield-portions S tothe position showmin Figure 6i-o'f the drawings. Air is admitted to theleft hand end ofth'e' cylinder 32', thus causing the cylinder tomove tothe left and lower the strippingipins 25.

The cooderatin fluid svstem is desi ned-so C u. b

thatit is impossible to puta flaski'npo'sition tor molding until thestripping pinshave been lowedcand thismeans that no sand willbe patt-inside the flask until the shield forming ortions are "in their upperposition. This 18 of decided advantage since with an apparatus, oi thischaracter wherein the shield portions are withdrawn from the confines;of

I the flask during a molding operation there is necessaril left at somestage an opening throught e pattern to the operating mechanism I iQHare. in upper pos1tion,,-they close off this opening entirely andprevent any'sand from. falling into themachme proper; With thesequential operation ofthe cylinders as above described, there is,never'any danger ofi'eworkman getting sand into the operating -;.-Ifdesired, zone-or both of parts, ofthe molding machine. 1 each pair ofshafts 16 and28 may be extended to accommodate thud lever for a manual:operation of @Ihave described a preferred embodiment of my invention asapplied toa tub of the recess type. In a tub of this 'ty the exposedwall" a side wall and thee ield isan extension thereof. .It will beunderstood that in stub of the corner type an end wall be-? comes anexposed wall and one shield is an extension of thisend wall. Where theterms fside wall and-end wall are used herein,

they are meant to include an end wall which im-expO'sedto view as willbe apparent. In either case theexposed .wall is inclined so that thejunction of the unexposed wall with the exposed wall is a non-verticalline, while the shield extends: beyond the same and terminates in avertical line which is joined in theiiwall of the-room. It will befurther understood that while I'have shown butone embodiment of theinvention, it is not thus limited since it may be otherwise embodiedwithin the scope of the following claims.

Iclainr: V :1. A pattern for a bath tub having a shield rtion which isan extension of a tub wall, L Including atub body portion and ashieldportion, co-planar with a wall of the body por- 1 tion, vthe shieldportion beingrelatively movable withrespectto the'body' portion to asubstantially outside the mold tion formed by th tt rA pattern fora-bath tub having a shield portion which is an extension of a tub wall,ineluding'atub body portion and a shield portion, the shieldportion-being relativelymovable with respect to the body portion to aposition substantially outside the mold portiiin formed by the pattern,the direction of movement of such portionbeing in part inportion;whichwardly of the pattern.

for a bath tub having a shield is an extension ofa tub wall, including atub body portion and a shield por- 3. Azpattem tion, the shield portionbeing relatively movahlewithrespect'to the body portion, and

below. When the shield formingpor "body portion,

means for imparting to the shield portion a component of movementinwardly from its operative. position so as to providesuitable bath tubhaving a shield portionwhich is annextens'ion of a tub wall,

including a tub body portion'anda shield portion,:the outer face oftheshield portion infa closed position being substantially flush withthelouter face'of a tub wall. onfthetubsboidy, portion, and guides inthe tub: body portion- 'forsuch shield portion.

.- 6. A: pattern for a bath tub having a shield portion which isanextension of a tub wall, including atub'body portion and a shieldportion, the outerfaceofthe shield portion in avelosed position beingsubstantially flush with the outer face of a tub wall on the-tub theshield portion being relatively movable with respect to the body -p ortion. and means formed on the engaging faces of the bodyuand shieldportion for causing the face of theashieldportion which'is flushwithxthe tub wall to retreat therefrom on movement of theshieldportionrelative to the a tub body portion.

7 A patternior a'bath tubhaving shield 1 including a tub body portionand a shield por tion, the shield portion being relativelylmov ablewith-respect to the body to a position substantially outside the mold a.portion formed from the pattern, and means for producing. pattern drafton the shield-portion.

r 8. A pattern'for a bath tub having a tub wall-inclined to thedirection of stripping of the mold and a shield portion similarly'inclined, including a tub "wall molding portion and av relativelymovable shield 'molding portion, the shield'niolding portion 'j-b'eingadapted forimovement "to a point-substam.

tially outside the mold, such movement b'e-' stripping.- 1 i 7. x 9. Apattern for a bathtub having a tub along a line inclined to thedirection of wall inclined to the direction of stripping of the mol'dand a shieldportion similarly in} clined ,'includinga tub'wall molding:portion and-a relatively movable shield molding por-' tion, the shieldmolding portion being adapted for movement to a point substantiallyoutside the mold, such movement beingzalong a line inclined to thedirection ofstripping, and also inclined to the inelin'ationof. the

side wallto providedraft for the shield mold 'ing portion.- v 1 "10. Apattern for a bath tub'having a tub wall and an extension thereofforming a shield withan'ex'posed face substantially co-v planar with theexposed face of the tub wall,

including a shield molding portion having aback face which is inclinedrelative to the exposed face to provide pattern draft for the shieldmolding portion, and means for withdrawing the shield molding portionfrom the flask in a plane intermediate the front and rear faces thereof.7

11. A pattern for a bath tub having a tub wall inclined to the directionof stripping of the mold and a shield portion similarly inclined,including a tub wall molding portion and a separate shield moldingportion, the shield molding portion being adapted for movement relativeto point substantially outside the mold, such movement being along aline inclined to the direction of stripping and also slight-1y inclinedto the inclination of said side wall to provide draft for the front faceof the shield molding portion, the shield molding portion having a rearface which is inclined to the front face of a greater amount than theinclination of theline of movement of the shield molding portion to thefront face, whereby draft for the rear face of the shield moldingportion is also provided.

12. A pattern for a bath tub having a nonvertical tubwall and asubstantially coplanar shield portion, including a tub body'portionwhich is inclined to reduce the angle which said tub wall would normallymake withfthe direction of stripping, and a separate shield moldingport-ion, the shield molding portion being adapted for movement to apoint substantially outside the mold.

13. A pattern fora bath tub having a tub wall inclined to. the directionof stripping of a the mold and a shield portion similarly inclined; saidshield portion further having a vertical end wall, including, a tub wallmolding portion, and a separate shield molding portion, the shieldmolding portion being adapted for movement relative to the tub patternto a point substantially outside the mold,

' such movement being alongthe' line slightly inclined to theinclination of the side wall to. provide draft for. the shield moldingpor- 7 tion, and also being inclined toward the tub wall proper toprovidedraft for the vertical end wall. 7 '14. A pattern for a bathtubhaving a body portion for defininga tub wall,

I movable shield portion constitutingsubstantially an extension ofthetub wall when in its molding position, and means for bod support forthe shield portion havinglongt.

the, tub pattern'to a movement for moving the g portion, the outer facefor suchshield I V the shield "portion in said guides, whereby arelatively moving the I shield portion inwardly of the body portion if Iand substantiallyin the plane of the wall,

longitudinally movable support for the shield.

15. A pattern for a bath tub having a shield portion which is anextension of a tub wall, in-

cluding a tub body portion and a. tapered shield portionfthe outer faceof the shield portion in a closed ly flush with the outer face of thetub wall on t-he'tub body portion, guides in the tub y portion for suchshield portion, and a tudinal and lateral shield portion in said guides.4 16. A pattern for a bathtub having a shiel' portion which is anextension of a tub wall,

including a tub body portion and a. shield of the shield portion inaclosed position being substantially flush with the outer face of a tubwall on the tub i bodyportion, guides in the tub body portion for suchshield portion, and means for moving the shield portion in said guides.

17. A pattern for a bath tub having a shield portion which is an shieldportion, the upper portion of the shield being of a smaller dimensionthan the lower portion, the outer face of the shield portion in a closedposition being-substantially flush with the outer face of a tub wallonthe tub body portion, guides in the tubbody portion portion, and meansfor moving the upward movement of the shield portion in said guidesmoves the shield portion outwardly in the plane of the tubwall.

18. A pattern for a bath tub having 'a-shield' portion which is anextension of'atubcwall, including a tub body portion and a taperedshield portion, the upper portion of the shield being of va smallerdimension than the lower portion, the outer faceoflthe, shield portionin ac-losed position beng'substantially flush with "the outer face of atub wall on'th'e tub body portion, guides in the tub body portion forsuch shield portion, and means for moving the shield portion in saidguides, wherebythe' downward movement ofthe shield "portion in said'g'uidesmoves the shieldportioninwardly in the plane of the tub wall.

In testimony whereof I have hereunto set my'hand. i

position'being substantialextension of a tubwall, including a tub bodyportion and a'ta-pered HENRY E. HnNRIoKs.

